Screw driver



F. BIDO SCREW DRIVER Feb. 1

Filed Nov. I I0, 1923 a m z 4 m, a J 1 9. v

if/mania 55.1010

ATTORNEY PA 1c.

FRANK mm, or JERSEY CITY HEIGHTS, NEW'JEESEY.

SCREW DRIVER.

. Application filed November 10, 1923. Serial No. 673,893.

This invention relates to screwdrivers, and it has for an object to provide a novel and improved combination screwdriver having a number of bits of different size which may be used as desired.

For further comprehension of the invention, and of the objects and advantages thereof, reference will be had to the following description and accompanying drawing, and to the appended claim in which the various novel features of the invention are more par ticularly set forth.

Fig. 1 of the drawing is a side elevational view of my improved screwdriver.

Fig. 2 is a longitudinal sectional view thereof with the inner parts in elevation.

Fig. 3 is a detail longitudinal elevational view showing the shank with the different bits mounted thereon.

Fig. 4 is a transverse sectional view taken on the line k4 of Fig. 2.

Fig. 5 is a fragmentary longitudinal view partly in section and partly in elevation, showing the manner in which the bits may be turned at right angles to the shank when desired.

Fig. 6 is a like view to Fig. 5 but showing the bit turned at an oblique angle to the shank.

Fig. 7 is a fragmentary elevational view of the arrangement shown in Fig. 6, but taken at right angles to the latter figure.

As here embodied myv improved screwdriver comprises -a handle havinga wooden grip 10 through which extends a metal bolt or core 11, this core having a head 11 at one end which engages over the end of the grip 10. This core is threaded for a distance adjacent its other end, which projects from the grip 10, a diametrie slot 12 being entered longitudinally into this latter end of the core.

The shank of the screwdriver is in the form of a detachable rod 15 which abuts against the end of the core 11. This shank 15 is slotted or bifurcated at opposite ends as at 16 and in said slots a pair of double ended bit-bars 17 are pivoted as at 18 midway between their ends, 'the slots 16 being long enough to accommodate the bit-bars therein, when the latter are extended in the axial line of the shank as in Fig. 3. The central, or body position of each bit-bar is of the same thickness and is of a width to continue the contour of the shank at the sides. These bit-bars are arranged to form four different bits as clearly shown in Fig. 3. 15 is retained in place by means of a sleeve 20 which freely surrounds said shank and has the end thereof which is turned toward the handle part of the screwdriver interiorly screwthreaded so as to engage the threads of the projecting end of the core 11, the extended end of the bit in the adjacent end of the shank engaging in the slot 12 in the core. The parts are preferably so arranged that when the sleeve 20 is screwed up against the grip member 10 the slotted end of the core 11 will be compressed sutiiciently to cause the bit to be firmly gripped in said slotted end and thereby hold the shank in place.

Slidably mounted on the shank 15 is a. ferrule 23 which is adapted to engage the bitbar which is in use and hold the latter in operative position, either'extended in alinement with the shank or in the angular positions shown in Figs. 5 and 6. In Fig. 5 the bit-bar 17 is shown as turned at right angles to the shank 15 and the end of the ferrule abuts against the side of the bit, a.

pin 25 on the ferrule being engaged in an offset 26 from a longitudinal groove 27 in the shank to hold the ferrule in the said position. In order to hold the bit in the oblique position shown in Fig. '6 a notch 28 is cut in the end of the ferrule, there being a notch in each end of the ferrule as will be The shank understood, this notch being of greater width than the thickness of the bit and being of such depth from the end of the ferrule as to hold the bit at the desired oblique angle when the bit is resting, at one side of the shank, in the bottom of the said notch and is engaged at the opposite side of the shank with the end of the ferrule. To hold 7 the ferrule in this position, which is slightly nearer the end of the shank than that as,- sumed when the bit is at right angles to the shank, the groove 27 is formed with an ofiset 29 from its extreme end in which the .pin 25 is engaged. This offset 29 itwill be noted, is on the opposite side of the groove 27 to the offset 26, so as to have the .notch 28 in the ferrule out of registry with the bit when the pin 25 is engaged in the latter offset.

' As will be apparent from the above description I have provided a screwdriver having four different bits, which can be readily brought into operative position, it beingapparent that the bit element on the forward end of the shankcan be readily reversed i when the locking ferrule is drawn back along the shank, while to reverse the shank it is only necessary to sli htly loosen the sleeve 20 and withdraw tfie end of the shank therefrom.

Having thus described my invention what I claim to be new and desire to protect by Letters Patent of the United States is as follows:

A screwdriver comprising a handle element, a shank reversible end for end in said handle element, a double ended bit carried by each end of the shank, each of said bits comprising a bar pivoted between its ends to said shank, said shank havin a longitudinal groove formed-therein and extending substantially from end to end thereof, said groove having a pair of lateral olfsets in;

each end, the respective offsets of each pair and ada ted to hold the bit at the forward end of t e shank in an operative position, out in each end thereof at one side thereof of greater width said ferrule having a note than the thickness of the said bits, and a pin on the ferrule engaging in said groove and adapted to be engaged in selected ones of the said oflsets to hold the ferrule in position retaining either of the said bits either extending at right angles to the'shank or at an oblique angle thereto, the bit being received at one\end in the said notch in the ferrule when in oblique position,

i In testimony whereof I have afixed my signature. I

FRANK BIDO. 

